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Q1) What are HTML logical tags? Explain all the logical tags.
A logical character tag describes how the text is being used, not necessarily how it is formatted.
The logical tags serve some important purposes:

Logical tags allow the browser to render that information in the manner most appropriate for that
browser. Text that should be emphasized (<EM>) may be best emphasized in Windows with
italics, and bold in Unix.

Logical tags help you, the author, keep track of what you are saying, without the distraction of
presentation. If you need to indicate someone's address, use <ADDRESS>, knowing it will be
presented in an appropriate manner.
common logical character tags
Description
Renders as
<cite>
citation
emphasizes the text in italics.
<code>
code sample
Displays some characters as code usually in Courier
font (i.e., fixed-width font)
<del>
deleted text
displays text with a line through it; renders differently in
Netscape and Internet Explorer
<dfn>
definition
italics; renders differently in Netscape and Internet
Explorer
<em>
emphasis
emphasizes the text in some way usually as italic.
<ins>
inserted text
underlined; renders differently in Netscape and Internet
Explorer
<kbd>
code sample
fixed-width font
<samp>
code sample
fixed-width font
<strong>
strong
Text is emphasized more strongly than usually as bold.
<var>
program variable
italics
Examples of logical tags
HTML code
Output
This is used for a short
This is used for a short quote.
Tag
<cite>quote</cite>.
<code>y = m * x + b</code>
<del>Deleted</del> text
<dfn>definition</dfn> text
This is <em> emphasized </em>.
<ins>inserted</ins> text
<kbd>code</kbd> sample
<samp>code</samp> sample
This is <strong>strong</strong>.
<var>program</var> variable
y = m * x + b
Deleted text
definition text
This is emphasized .
inserted text
code sample
code sample
This is strong.
Q2) Define XSL-FO.
XSL-FO - eXtensible Stylesheet Language Formatting Objects - XSL Formatting Objects, or XSL-FO, is a
markup language for XML document formatting which is most often used to generate PDFs. XSL-FO is
part of XSL (Extensible Stylesheet Language), a set of W3C technologies designed for the transformation
and formatting of XML data.
Unlike the combination of HTML and CSS, XSL-FO is a unified presentational language. It has no
semantic markup in the way it is meant in HTML. And, unlike CSS which modifies the default presentation
of an external XML or HTML document, it stores all of the document's data within itself.
The general idea behind XSL-FO's use is that the user writes a document, not in FO, but in an XML
language. XHTML, DocBook, and TEI are all possible examples. Then, the user obtains an XSLT
transform, either by writing one themselves or by finding one for the document type in question. This
XSLT transform converts the XML into XSL-FO.
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